JP2019184073A - Differential device - Google Patents

Abstract

An object of the present invention is to provide a differential device capable of preventing an electromagnet from falling off without increasing the size. A differential case (3) and a side gear (9) arranged so as to be relatively rotatable, an intermittent member (31) connected to the differential case (3) so as to be axially movable and integrally rotatable, and provided between the intermittent member (31) and the side gear (9). The differential device 1 includes the intermittent portion 53 provided, and an electromagnet 57 disposed on the outer periphery of the differential case 3 and operating the axial movement of the intermittent member 31, wherein the electromagnet is disposed between the differential case 3 and the electromagnet 57 in the radial direction. A regulating member 85 for regulating the axial movement of the electromagnet 57 within the range of 57 in the axial direction is arranged. [Selection diagram] Fig. 1

Description

  The present invention relates to a differential device applied to a vehicle.

  Conventionally, as a power transmission device, a differential case and a side gear as a pair of rotating members arranged so as to be relatively rotatable, an intermittent member that is axially movable and integrally connected to the differential case as one rotating member, An intermittent portion provided between the intermittent member and the side gear as the other rotating member for intermittently transmitting power between the differential case and the side gear, and an electromagnet disposed on the outer periphery of the differential case for operating the axial movement of the intermittent member. Are known (for example, see Patent Document 1).

  In this power transmission device, the locking means as a restricting member fixed with a snap ring function in a groove formed on the outer periphery of the boss portion of the differential case is arranged so as to contact the axial end surface of the electromagnet. The movement of the electromagnet in the axial direction is restricted.

  By restricting the movement of the electromagnet in the axial direction by the locking means in this way, the electromagnet does not fall out of the differential case when transporting the power transmission device when assembling to the vehicle, and the power transmission device is stably transported. can do.

JP 2011-99460 A

  However, in the power transmission device as in Patent Document 1, since the restricting member that contacts the axial end surface of the electromagnet is engaged with the groove portion of one rotating member, the groove portion is formed on one rotating member. In addition, a portion directed axially outward from the groove is necessary for one rotating member, and the apparatus has been enlarged.

  Therefore, an object of the present invention is to provide a differential device that can prevent the electromagnet from falling off without increasing the size.

  The present invention includes a differential case that rotates upon input of a driving force, a pinion that is accommodated in the differential case, a pair of side gears that mesh with the pinion and that are accommodated in the differential case so as to be differentially rotatable and output the driving force, An intermittent member that is axially movable and integrally rotatable with the differential case, an intermittent member provided between the intermittent member and one of the pair of side gears, and an outer periphery of the differential case. A differential device including an anti-rotation member that engages with a system member, and an electromagnet that moves the movable member by excitation to operate the axial movement of the intermittent member. A restricting member for restricting axial movement of the electromagnet with respect to the differential case is disposed on the inner diameter side of the coil. Characterized in that at one axial side of the timber with the outer peripheral surface and the sliding of the differential case is supported in the radial direction.

  The present invention also provides an outer case that is rotated by input of a driving force, an inner case that is rotatably accommodated in the outer case, a pinion that is accommodated in the inner case, and a meshing difference between the pinion and the pinion. A pair of side gears arranged in the outer case so as to be capable of dynamic rotation and outputting a driving force, an interrupting part for interrupting power transmission between the outer case and the inner case, and a stationary system member arranged on the outer periphery of the outer case A detent member that engages with the electromagnet that moves the movable member by excitation and operates the intermittent portion of the intermittent portion, wherein the differential device is in an axial range of the electromagnet and on the inner diameter side of the electromagnetic coil Is provided with a restricting member for restricting the axial movement of the electromagnet with respect to the outer case, and the electromagnet is arranged on one axial side of the restricting member. Characterized in that it is supported by the outer peripheral surface and the sliding of the serial outer case in the radial direction.

  Therefore, in such a differential device, since the restricting member that restricts the axial movement of the electromagnet is disposed within the range of the electromagnet in the axial direction, it is possible to prevent the electromagnet from dropping without increasing the size.

  According to the present invention, there is an effect that it is possible to provide a differential device that can prevent the electromagnet from falling off without increasing the size.

It is sectional drawing of the power transmission device which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is sectional drawing which shows the other example of the groove part of the power transmission device which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is sectional drawing when a floating washer is arrange | positioned at the power transmission device which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is sectional drawing which shows the other example of the floating washer of the power transmission device which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. (A) is sectional drawing of the power transmission device which concerns on 2nd Embodiment of this invention. (B) is a principal part enlarged view of Fig.9 (a). It is a principal part enlarged view of Fig.9 (a). It is sectional drawing of the power transmission device which concerns on 3rd Embodiment of this invention.

  First, an overall configuration of a power transmission device as an example according to an embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the power transmission device 1 includes a differential mechanism 11 including a differential case 3, a pinion set 5, and a pair of side gears 7 and 9. The differential device has a mechanism 13.

  The differential case 3 is rotatably supported by a stationary member (not shown) such as a carrier via bearings 19 (one-side bearing is not shown) at boss portions 15 and 17 formed on both sides in the axial direction.

  The differential case 3 is formed with a flange portion 21 to which a ring gear (not shown) is fixed. The ring gear transmits a driving force. For example, the power transmission is coupled to an input side mechanism such as a propeller shaft so as to be integrally rotatable. Engage with a gear (not shown) and drive force is transmitted to drive the differential case 3 to rotate.

  In such a differential case 3, the pinions 27 and 29 are accommodated in the pinion accommodation holes 23 and 25 provided in the axial direction, the pair of side gears 7 and 9 are accommodated in the central portion, and the intermittent mechanism 13 is provided on the side wall side. The intermittent member 31 is accommodated, and the driving force transmitted to the differential case 3 is transmitted to each accommodating member.

  The pinions 27 and 29 are formed of cylindrical helical gears, and the two pinions 27 and 29, which are short and long, constitute the pinion set 5, and the plurality of pinion sets 5 are respectively inserted into the plurality of pinion receiving holes 23 and 25 of the differential case 3. Contained.

  The short pinion 27 in the pinion set 5 includes a first gear portion 33 and a second gear portion 35. The first gear portion 33 meshes with the side gear 7. The second gear portion 35 is positioned on the outer diameter side of the boss portion of the side gear 7 and meshes with the third gear portion 37 of the pinion 29.

  The long pinion 29 of the pinion set 5 includes a third gear portion 37, a shaft portion 39, and a fourth gear portion 41. The third gear portion 37 meshes with the second gear portion 35 of the pinion 27. The shaft portion 39 is formed between the third gear portion 37 and the fourth gear portion 41 so as to have a smaller diameter than the third gear portion 37 and the fourth gear portion 41, and prevents interference with the side gear 7. The fourth gear portion 41 meshes with the side gear 9.

  The pinions 27 and 29 constituting the pinion set 5 are respectively accommodated in the pinion accommodation holes 23 and 25 of the differential case 3 and revolved by the rotation of the differential case 3.

  Such a pinion set 5 transmits a driving force to the pair of side gears 7 and 9, and rotates into the pinion receiving holes 23 and 25 so as to be driven to rotate when a differential rotation occurs between the pair of side gears 7 and 9 engaged with each other. Each tooth tip surface is housed so as to be able to rotate and frictionally slide on the inner wall surface of the pinion housing holes 23 and 25.

  That is, the magnitude of the meshing reaction force between the pinion set 5 and the pair of side gears 7 and 9 changes depending on the magnitude of the driving torque input to the differential case 3, and the tooth tip surface of the pinion set 5 and the pinion accommodation hole of the differential case 3 A torque-sensitive differential limiting function in which the magnitude of the frictional force is changed between the inner wall surfaces 23 and 25.

  The pair of side gears 7 and 9 are supported in the differential case 3 so as to be relatively rotatable at respective boss portions, and mesh with the pinion set 5. In addition, between the side gear 7 and the differential case 3 in the axial direction, between the pair of side gears 7 and 9, and between the side gear 9 and the differential case 3 in the axial direction, the side gears 7 and 9 and the pinion set 5 are generated by the meshing reaction force. Thrust washers 43, 45, 47 for receiving the side gears 7, 9 moving in the axial direction are arranged.

  These thrust washers 43, 45, 47 generate frictional force due to the thrust force (meshing reaction force) generated in the side gears 7, 9, thereby increasing the torque-sensitive differential limiting function.

  The pair of side gears 7 and 9 are provided with spline-shaped connecting portions 49 and 51 on the inner peripheral side. For example, a drive shaft (not shown) connected to an output side mechanism such as a left and right wheel is provided on the side gear 7 or 9. 9 is connected to the differential case 3 so as to be integrally rotatable, and outputs the driving force input to the differential case 3 to the left and right output side mechanisms.

  The differential between the pair of side gears 7 and 9 is locked by the connection of the intermittent mechanism 13, and the driving force transmitted to the pair of side gears 7 and 9 is uniformly output to the left and right output side mechanisms. .

  Thus, the power transmission device 1 having the intermittent mechanism 13 that interrupts the differential of the differential mechanism 11 is a differential device having a so-called differential lock function. The intermittent mechanism 13 includes an intermittent member 31, an intermittent portion 53, a movable member 55, and an electromagnet 57.

  In the intermittent member 31, a base portion 59 accommodated in the differential case 3 is formed in an annular shape, and an outer peripheral surface of the base portion 59 is supported in a radial direction with respect to an inner peripheral support surface formed in a concave portion of a side wall of the differential case 3. ing.

  The intermittent member 31 is disposed so as to be movable in the axial direction between the clutch portion 61 fixed to the side gear 9 so as to rotate together with the side gear 9 and the side wall of the differential case 3.

  Such an intermittent member 31 is provided with a plurality of engaging projections 63 in the circumferential direction, and a plurality of engaging portions 65 provided to open outward in the axial direction between the rotation directions of the side wall of the differential case 3. The intermittent member 31 is locked to the differential case 3 by being engaged with the differential case 3, and is arranged so as to be rotatable integrally with the differential case 3.

  Note that cam surfaces having the same inclination are formed on the opposing surfaces of the engaging convex portion 63 and the engaging portion 65 in the rotational direction, and the intermittent portion 53 is moved when the intermittent member 31 is moved in the connecting direction of the intermittent portion 53. The connection has been enhanced.

  Between this intermittent member 31 and the clutch part 61 provided on the side surface side of the side gear 9, there is provided an intermittent part 53 provided with meshing teeth provided facing each other in the axial direction.

  The intermeshing portion 53 is configured by meshing teeth formed on the intermittence member 31 and meshing teeth formed on a clutch portion 61 provided on the side surface side of the side gear 9.

  When the intermittent portion 53 is engaged, the intermittent portion 53 is in a connected state, and the intermittent member 31 and the side gear 9 are connected so as to be integrally rotatable, that is, the differential case 3 and the side gear 9 are connected so as to be integrally rotatable. It becomes the diff lock state.

  On the other hand, a return spring 67 is provided on the radially inner side of the intermittent portion 53 between the axial direction of the intermittent member 31 and the clutch portion 61, and urges the intermittent member 31 in the connection release direction of the intermittent portion 53.

  The return spring 67 releases the meshing of the intermittent portion 53, the connection of the intermittent portion 53 is released, the differential case 3 and the side gear 9 are relatively rotatable, and the differential lock state of the differential mechanism 11 is released.

  Such an intermittent state of the intermittent portion 53 is intermittently operated by the movable member 55 and the electromagnet 57 that moves the movable member 55 in addition to the return spring 67.

  The movable member 55 is disposed on the outer periphery of an annular support portion 69 made of a nonmagnetic material provided integrally with the electromagnet 57 on the inner diameter side of the electromagnet 57 so as to be movable in the axial direction, and movement in the radial direction is restricted. As shown in the figure, it is supported by a support portion 69 and includes an annular magnetic flux transmission portion 71 and an annular movement operation portion 73.

  The magnetic flux transmission part 71 is formed in an annular shape from a magnetic material, and is arranged on the inner diameter side of the electromagnet 57 with an air gap that is a minute gap set so that magnetic flux can be transmitted. A movement operation unit 73 is integrally fixed to the inner periphery of the magnetic flux transmission unit 71.

  The movement operation unit 73 is formed in a ring shape from a nonmagnetic material, and prevents the magnetic flux from leaking from the inner peripheral side of the magnetic flux transmission unit 71 to the differential case 3 side. The moving operation unit 73 is arranged on the outer periphery of the support unit 69 made of a nonmagnetic material so as to be movable in the axial direction, and further prevents magnetic flux from leaking to the differential case 3 side.

  The end surface on the intermittent member 31 side of such a movement operation part 73 is arrange | positioned so that contact with the interlocking member 75 fixed to the engagement convex part 63 of the intermittent member 31 is carried out, and the movement to the axial direction of the magnetic flux transmission part 71 is carried out. Thus, the interlocking member 75 is pressed, and the intermittent member 31 is pressed through the interlocking member 75 against the urging force of the return spring 67. The movable member 55 is moved by an electromagnet 57.

  The electromagnet 57 is arranged in the radial direction with respect to the differential case 3 by sliding the inner peripheral surface of the annular support portion 69 made of a nonmagnetic material integrally provided on the inner diameter side with the outer peripheral surface of the boss portion 17 of the differential case 3. An electromagnetic coil 77 and a core 79 are supported.

  Here, the electromagnet 57 includes not only the electromagnetic coil 77 and the core 79 but also a support portion 69 provided integrally on the inner diameter side of the core 79. Hereinafter, the electromagnetic coil 77, the core 79, and the support portion 69 are combined. This will be referred to as an electromagnet 57.

  The electromagnetic coil 77 is annularly wound with a predetermined number of turns and molded with resin. The electromagnetic coil 77 is connected to a lead wire (not shown), and is connected to a controller (not shown) that controls energization via the lead wire.

  The core 79 is made of a magnetic material so that a magnetic field is formed when the electromagnetic coil 77 is energized, and has a predetermined magnetic path cross-sectional area. The core 79 covers the periphery of the electromagnetic coil 77 so that magnetic flux can be transferred to and from the magnetic flux transmitting portion 71 of the movable member 55 on the inner diameter side.

  The electromagnet 57 forms a self-contained magnetic flux loop by transmitting magnetic flux through the core 79 and the magnetic flux transmitting portion 71 of the movable member 55 by energizing the electromagnetic coil 77, and connecting the movable member 55 to the intermittent portion 53. Move in the direction.

  Such an electromagnet 57 is prevented from rotating relative to the stationary system member by engaging a stationary member (not shown) integrally provided on the axial end surface of the core 79 with a stationary member such as a carrier. ing.

  Here, the electromagnet 57 is disposed so that the end surface in the axial direction of the support portion 69 on the differential case 3 side can be brought into contact with the stepped portion formed on the boss portion 17 of the differential case 3, and one side in the axial direction (here, the differential case 3). The positioning in a direction toward the side) is regulated.

  On the other hand, the electromagnet 57 is disposed such that the axial end surface of the support portion 69 on the bearing 19 side can come into contact with the inner race of the bearing 19 and moves to the other side in the axial direction (here, the direction toward the bearing 19 side). Is positioned so as to be regulated.

  In the power transmission device 1 configured as described above, a magnetic flux transmission is achieved by effectively using the shortest self-contained magnetic flux loop formed by the magnetic flux that is transmitted through the core 79 and the magnetic flux transmission portion 71 by the excitation of the electromagnet 57. The part 71 is moved to the intermittent member 31 side, and the end surface of the moving operation part 73 presses the interlocking member 75 interlocked with the intermittent member 31.

  By the pressing operation of the intermittent member 31 by the movable member 55, the intermittent member 31 is moved in the connecting direction of the intermittent portion 53 against the urging force of the return spring 67, and the intermittent portion 53 is connected. Due to the connection of the intermittent portion 53, the differential case 3 and the side gear 9 are connected, and the differential mechanism 11 enters the differential lock state.

  On the outer diameter side of the interlocking member 75, an operation part (not shown) for turning on / off a position switch (not shown) for detecting the intermittent state of the intermittent part 53 is disposed. The outer diameter side of the member 75 is engaged.

  By engaging the interlocking member 75 with the operation part of the position switch in this way, the operation part is turned ON / OFF by the axial movement of the interlocking member 75, and the intermittent part is detected by detecting the intermittent state of the position switch. 53, that is, whether or not the differential mechanism 11 in the power transmission device 1 is in the differential lock state can be detected.

  In such a power transmission device 1, when the differential case 3 is supported by the bearing 19, the electromagnet 57 is restricted by the bearing 19 from moving to the other side in the axial direction (the direction of dropping from the differential case 3). .

  However, for example, when the differential case 3 is not supported by the bearing 19 such as when the electromagnet 57 is assembled and transported to the differential case 3, the electromagnet 57 can move to the other side in the axial direction. There is a risk that the electromagnet 57 may fall off the differential case 3 from time to time.

  Therefore, a regulating member 85 that regulates the axial movement of the electromagnet 57 is disposed between the differential case 3 and the electromagnet 57. Hereinafter, the power transmission device including the regulating member 85 will be described in detail with reference to FIGS.

(First embodiment)
The first embodiment will be described with reference to FIGS.

  As described above, the power transmission device 1 according to the present embodiment is movable in the axial direction to the differential case 3 and the side gear 9 as a pair of rotational members arranged so as to be relatively rotatable, and to the differential case 3 as one rotational member. An intermittent member 31 connected so as to be integrally rotatable, an intermittent portion 53 provided between the intermittent member 31 and the side gear 9 as the other rotational member for intermittently transmitting power between the differential case 3 and the side gear 9, and a differential case 3 and an electromagnet 57 for operating the axial movement of the intermittent member 31.

  And between the radial direction of the differential case 3 and the electromagnet 57, the regulating member 85 which regulates the axial movement of the electromagnet 57 within the axial range of the electromagnet 57 is disposed.

  Further, the regulating member 85 is disposed with a gap between the electromagnet 57 and the axial direction.

  Furthermore, the regulating member 85 is disposed with a gap between the electromagnet 57 and the radial direction.

  The differential case 3 is supported in the radial direction by a bearing 19 as a first bearing, and the electromagnet 57 is restricted from moving in both axial directions by the differential case 3 and the bearing 19.

  As shown in FIGS. 1 and 2, the electromagnet 57 includes, as described above, the stepped portions formed at the boss portions 17 of the differential case 3 at both end surfaces in the axial direction of the support portion 69 and the inner race of the bearing 19. It arrange | positions so that contact | abutting is possible, and it is positioned so that the movement to both axial directions may be controlled.

  In this way, by restricting the movement of the electromagnet 57 in both axial directions by the differential case 3 and the bearing 19, the electromagnet 57 can be stably disposed with respect to the differential case 3, and the intermittent characteristics of the intermittent portion 53 can be stabilized. Can be

  Such an electromagnet 57 is prevented from dropping from the differential case 3 by the restricting member 85 in a state where the differential case 3 is not supported by the bearing 19 at the time of conveyance or the like.

  The restricting member 85 is formed in an annular shape so as to have a snap ring function, and the inner peripheral side is engaged with an engaging recess 87 formed on the outer periphery of the boss portion 17 of the differential case 3. The restricting member 85 and the engaging recess 87 are located within the axial range of the electromagnet 57.

  Here, the range in the axial direction of the electromagnet 57 means the range in the axial direction including the support portion 69 formed integrally with the core 79, and here, the regulating member 85 and the engagement recess 87. Are positioned within the range of the support portion 69 in the axial direction.

  Thus, by arranging the restricting member 85 and the engaging recess 87 within the range of the electromagnet 57 in the axial direction, the engaging recess 87 with which the restricting member 85 is engaged can protrude from the electromagnet 57 in the axial direction. And the differential case 3 is not enlarged.

  In addition, it is not necessary to press-fit a washer or the like that contacts the end face of the electromagnet 57 on the bearing 19 side into the boss portion 17 of the differential case 3, and it is not necessary to make a severe setting such as a space for providing the washer or the like or press-fitting .

  The regulating member 85 engaged with the engaging recess 87 formed in the axial range of the electromagnet 57 is engaged with the inner peripheral side of the electromagnet 57 at the outer peripheral side.

  A groove portion 89 that opens toward the end surface in the axial direction of the support portion 69 is provided in a portion of the support portion 69 of the electromagnet 57 that faces the restricting member 85 in the radial direction.

  The groove portion 89 is disposed with a gap between the electromagnet 57 on the boss portion 17 of the differential case 3 and the bearing 19 in contact with the electromagnet 57 with a gap in the axial direction from the outer peripheral side of the regulating member 85. A gap is also provided between the member 85 and the outer peripheral side in the radial direction.

  For this reason, when the power transmission device 1 is mounted on the vehicle and the differential case 3 is rotating, the regulating member 85 does not restrict the axial movement of the electromagnet 57, and the load of the electromagnet 57 accompanying the rotation of the differential case 3. Is not input to the restricting member 85.

  Accordingly, when the position of the electromagnet 57 in the axial direction is positioned by the differential case 3 and the bearing 19, no load is input to the restricting member 85. Therefore, the material and shape of the restricting member 85 are set to be severe. There is no need to do so, and the cost of the regulating member 85 can be reduced.

  On the other hand, when the bearing 19 is not in contact with the electromagnet 57 at the time of conveyance or the like, the groove portion 89 comes into contact with the outer peripheral side of the regulating member 85 when the electromagnet 57 tries to move in the axial direction in the direction of dropping from the differential case 3. The movement of the electromagnet 57 in the axial direction is restricted to prevent the electromagnet 57 from falling off the differential case 3.

  Here, a taper portion 91 is provided on the bottom portion side of the groove portion 89 that comes into contact with the regulating member 85 in a direction in which the electromagnet 57 is detached from the differential case 3.

  The tapered portion 91 does not deform the regulating member 85 when it contacts the outer peripheral side of the regulating member 85 at the time of conveyance or the like, but a force greater than a predetermined force is applied as when the electromagnet 57 is removed from the differential case 3. Sometimes, the restricting member 85 is deformed so that the outer peripheral side of the restricting member 85 is reduced in diameter toward the inner peripheral side, and the detachment of the electromagnet 57 from the differential case 3 is facilitated to improve the assemblability.

  Assembling of the electromagnet 57 to the differential case 3 to which such a restriction member 85 is assembled is performed by inserting the support portion 69 of the electromagnet 57 into the boss portion 17 of the differential case 3, The diameter of 85 is reduced so as to be accommodated in the engagement recess 87.

  Then, by inserting the electromagnet 57 until the support portion 69 of the electromagnet 57 contacts the stepped portion of the boss portion 17 of the differential case 3, the regulating member 85 is restored, and the outer peripheral side of the regulating member 85 is disposed in the groove portion 89. .

  By arranging the regulating member 85 in the groove portion 89 in this way, when the bearing 19 is not in contact with the electromagnet 57 at the time of conveyance or the like, the regulating member 85 and the bottom side of the groove portion 89 are in contact with each other, The movement of the electromagnet 57 in the axial direction can be restricted, and the electromagnet 57 can be prevented from dropping from the differential case 3.

  Here, as shown in FIGS. 3 and 4, the groove portion 89 formed in the support portion 69 of the electromagnet 57 in which the regulating member 85 is disposed is provided without opening toward the end surface in the axial direction of the support portion 69. It is good also as the groove part 89a.

  The groove portion 89a is disposed with a gap between the electromagnet 57 on the boss portion 17 of the differential case 3 and the axial direction from the outer peripheral side of the restricting member 85 in a state where the bearing 19 is in contact with the electromagnet 57. A gap is also provided between the regulating member 85 and the outer peripheral side in the radial direction.

  For this reason, even if it is such a groove part 89a, when the position of the electromagnet 57 in the axial direction is positioned by the differential case 3 and the bearing 19, no load is input to the restricting member 85, and the restriction is not caused. The cost of the member 85 can be reduced.

  In addition, since the groove portion 89a is not opened toward the end surface on the bearing 19 side of the support portion 69, the electromagnet 57 can be supported radially on the boss portion 17 of the differential case 3 by the flesh portion on the bearing 19 side. And the support of the electromagnet 57 can be stabilized.

  Here, as shown in FIGS. 5 and 6, a floating washer 93 is disposed between the support portion 69 of the electromagnet 57 and the inner race of the bearing 19 so that the electromagnet 57 moves toward the bearing 19 in the axial direction. May be regulated.

  The floating washer 93 is inserted into the outer periphery of the boss portion 17 of the differential case 3 by a gap baffle and disposed in contact with the support portion 69 before the bearing 19 is disposed on the outer periphery of the boss portion 17 of the differential case 3. By arranging the bearing 19, it is arranged between the electromagnet 57 and the bearing 19 in the axial direction.

  Thus, by disposing the floating washer 93 between the electromagnet 57 and the bearing 19 in the axial direction, the electromagnet 57 and the bearing 19 can be prevented from sliding directly, and the durability of the bearing 19 is improved. Can do.

  In addition, since the floating washer 93 is disposed on the outer periphery of the boss portion 17 of the differential case 3 by a gap fit, it is not necessary to make a severe setting such as press fitting, and the floating washer 93 can be easily disposed.

  On the other hand, as shown in FIGS. 7 and 8, the floating washer 93a is integrated with the support portion 69 of the electromagnet 57 by welding or the like so as to be positioned between the support portion 69 of the electromagnet 57 and the inner race of the bearing 19. May be provided.

  Thus, by providing the floating washer 93a and the electromagnet 57 integrally, it is possible to reduce the number of parts, reduce the number of steps for assembling the floating washer 93a, and improve the assemblability.

  In such a power transmission device 1, the regulating member 85 that regulates the axial movement of the electromagnet 57 within the axial range of the electromagnet 57 is disposed between the differential case 3 and the electromagnet 57 in the radial direction. The member 85 does not protrude from the end face in the axial direction of the electromagnet 57 toward the outside in the axial direction, and there is no need to provide a portion for disposing the regulating member 85 in the axially outward direction of the electromagnet 57 of the differential case 3.

  Therefore, in such a power transmission device 1, the restricting member 85 that restricts the movement of the electromagnet 57 in the axial direction is disposed within the range of the electromagnet 57 in the axial direction. Can be prevented.

  Further, since the regulating member 85 is disposed with a gap between the electromagnet 57 and the electromagnet 57 in the axial direction, when the differential case 3 is rotating, a load due to the axial movement of the electromagnet 57 is input to the regulating member 85. Therefore, the movement of the electromagnet 57 in the axial direction during conveyance can be stably regulated by the regulating member 85.

  Furthermore, since the regulating member 85 is arranged with a gap between the electromagnet 57 in the radial direction, the regulating member 85 and the electromagnet 57 do not slide, and the durability of the regulating member 85 can be improved. .

  Further, since the electromagnet 57 is restricted from moving in both axial directions by the differential case 3 and the bearing 19, when the differential case 3 is supported by the bearing 19, the restricting member 85 restricts the axial movement of the electromagnet 57. Therefore, the cost of the regulating member 85 can be reduced by, for example, reducing the rigidity of the regulating member 85.

(Second Embodiment)
The second embodiment will be described with reference to FIGS.

  In the power transmission device 101 according to the present embodiment, the regulating member 85 is disposed in the opening of the oil passage 103 provided in the differential case 3 as one rotating member.

  The electromagnet 57 includes a support portion 107 supported on the outer periphery of the differential case 3, and the support portion 107 is made of a magnetic material and is disposed on the outer peripheral side of the differential case 3 and extends in the axial direction. And a radial portion 111 projecting radially from the axial portion 109.

  Further, a solenoid washer 113 made of a magnetic material is disposed between the support portion 107 and the bearing 19 in the axial direction.

  The radial portion 111 of the support portion 107 is provided with a slit 115 penetrating the radial portion 111 in the axial direction, and the solenoid washer 113 has an outer diameter arranged radially inward from the inner diameter of the slit 115. .

  The same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration and functions will be omitted with reference to the first embodiment. However, the configuration is the same as that of the first embodiment. The effect achieved is the same.

  As shown in FIGS. 9 and 10, the boss portion 17 of the differential case 3 is provided with a plurality of oil passages 103 communicating the inner periphery and the outer periphery of the boss portion 17 at equal intervals in the circumferential direction.

  The oil passage 103 causes the lubricating oil that has flowed into the differential case 3 to flow toward the electromagnet 57 disposed on the outer periphery of the boss portion 17 by the rotation of the differential case 3.

  The opening on the electromagnet 57 side of the oil passage 103 is engaged with the inner peripheral side of the restricting member 85, and the restricting member 85 and the oil passage 103 are located within the range of the electromagnet 57 in the axial direction. .

  The support portion 69 of the electromagnet 57 facing the regulating member 85 in the radial direction is provided with a groove portion 105 continuously in the circumferential direction.

  The groove portion 105 is arranged with a gap between the electromagnet 57 on the boss portion 17 of the differential case 3 and the axial direction from the outer peripheral side of the regulating member 85 in a state where the bearing 19 (see FIG. 1) is in contact with the electromagnet 57. Has been. A gap may be formed between the groove portion 105 and the outer peripheral side of the regulating member 85 in the radial direction.

  For this reason, when the axial position of the electromagnet 57 is positioned by the differential case 3 and the bearing 19, the load due to the axial movement of the electromagnet 57 is not input to the regulating member 85. Cost can be reduced.

  In the electromagnet 57 in which the restriction member 85 is disposed, the support portion 107 provided integrally with the core 79 is formed of a magnetic material, and includes an axial portion 109 and a radial portion 111.

  The axial portion 109 of the support portion 107 extends in a cylindrical shape in the axial direction, the inner peripheral surface is disposed on the outer peripheral surface of the boss portion 17 of the differential case 3, and the electromagnet 57 is supported by the differential case 3 in the radial direction. Yes. A radial direction portion 111 is integrally provided at the end of the axial direction portion 109.

  The radial portion 111 of the support portion 107 protrudes outward in the radial direction with one member continuous from the end portion of the axial portion 109. The radially outer end of the radial direction portion 111 is crimped after being press-fitted into the inner diameter of the core 79, or is provided integrally with the core 79 by fixing means such as welding.

  A solenoid washer 113 made of a magnetic material is disposed between the radial direction portion 111 of the support portion 107 and the bearing 19, and the support portion 107 of the electromagnet 57 and the inner race of the bearing 19 are directly connected. Prevents sliding.

  Here, the floating washer 93 (see FIG. 5) disposed between the electromagnet 57 and the bearing 19 in the axial direction is formed of a nonmagnetic material in order to prevent magnetic flux from leaking through the floating washer 93. .

  By the way, since the nonmagnetic material is more expensive than the magnetic material, the solenoid washer 113 is formed of a magnetic material, and can be manufactured at a lower cost than the floating washer 93.

  However, since the support portion 107 is also made of a magnetic material in addition to the solenoid washer 113, there is a possibility that magnetic flux leakage occurs not only from the solenoid washer 113 but also from the support portion 107 to the differential case 3 side.

  Accordingly, the radial portion 111 of the support portion 107 is provided with a slit 115 that penetrates the radial portion 111 in the axial direction.

  A plurality of slits 115 (three to six in this case) are provided at equal intervals in the circumferential direction of the radial portion 111 of the support portion 107 and are elongated holes extending along the circumferential direction.

  By providing the slit 115 in this way, a space portion that cannot transfer magnetic flux between the core 79 and the support portion 107 in the radial direction can be provided. Even if the support portion 107 is formed of a magnetic material, the magnetic flux Leakage can be prevented.

  The portion of the radial portion 111 that is radially outward from the slit 115 is a fixing portion that is integrally fixed to the inner diameter of the core 79 via fixing means, and the core 79 and the support portion 107 are stably fixed. Can be integrated.

  If the solenoid washer 113 is disposed so as to overlap the slit 115 in the axial direction, the magnetic flux can be transferred between the core 79 and the solenoid washer 113, and magnetic flux leakage may occur. is there.

  For this reason, the solenoid washer 113 has an outer diameter arranged radially inward from the inner diameter of the slit 115 so as not to overlap the slit 115 in the axial direction.

  By disposing the solenoid washer 113 with respect to the slit 115 in this way, it is possible to prevent the magnetic flux from being transferred between the core 79 and the solenoid washer 113. Even if the solenoid washer 113 is made of a magnetic material, the magnetic flux leakage Can be prevented.

  The core 79 and the support portion 107 are integrally provided with the inner diameter of the core 79 and the radially outer end of the radial portion 111. However, the present invention is not limited to this, and the core 79 and the radial portion 111 The respective opposing surfaces in the axial direction may be integrally fixed via fixing means.

  In such a power transmission device 101, since the regulating member 85 is disposed in the opening of the oil passage 103 provided in the differential case 3, sufficient lubricating oil is supplied to the sliding portion between the electromagnet 57 and the differential case 3. Therefore, the lubricity in the vicinity of the electromagnet 57 can be improved.

  Further, since the support portion 107 and the solenoid washer 113 are made of a magnetic material, the cost can be reduced as compared with the case where the support portion 107 and the solenoid washer 113 are formed of a nonmagnetic material.

  Further, the radial portion 111 of the support portion 107 is provided with a slit 115 penetrating the radial portion 111 in the axial direction, and the solenoid washer 113 is arranged with the outer diameter radially inward from the inner diameter of the slit 115. Therefore, even if the support 107 and the solenoid washer 113 are formed of a magnetic material, magnetic flux leakage can be prevented.

  First, the overall configuration of a power transmission device as another example according to the embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 11, the power transmission device 201 includes an outer case 203, an inner case 205, a pinion shaft 207, a pinion 209, and a pair of side gears 211 and 213, and the outer case 203 and the inner case 205 It is a differential apparatus which has the interruption mechanism 215 which interrupts the motive power transmission.

  The outer case 203 is a stationary system such as a carrier on the outer periphery of boss portions 217 and 219 provided on both sides in the axial direction via bearings 19 (one side bearing is not shown but the other is shown in FIG. 1). A member (not shown) is rotatably supported.

  The outer case 203 is provided with a flange portion 221 to which a ring gear (not shown) is fixed, and the ring gear transmits a driving force, for example, a power connected to an input side mechanism such as a propeller shaft so as to be integrally rotatable. The driving force is transmitted to the inner case 205 housed inside through an intermittent portion 235 that meshes with a transmission gear (not shown).

  The inner case 205 has a rotational axis disposed in parallel with the outer case 203 and is accommodated in the outer case 203 so as to be rotatable relative to the outer case 203.

  The inner case 205 accommodates a pinion shaft 207, a pinion 209, and a pair of side gears 211 and 213, and the driving force input to the inner case 205 is transmitted.

  The pinion shaft 207 has an end portion engaged with the inner case 205 and is prevented from being detached by a pin. A plurality of types of pinion shafts 207 that are rotationally driven integrally with the inner case 205 are accommodated in the inner case 205. A pinion 209 is supported on the pinion shaft 207.

  A plurality of pinions 209 are arranged at equal intervals in the circumferential direction of the inner case 205, and are respectively supported on the outer end side of the two short pinion shafts 207 and the both end sides of the long pinion shaft 207, and revolved by the rotation of the inner case 205. To do.

  Between the back side of the pinion 209 and the inner case 205, a spherical washer 223 that receives the radial movement generated when the pinion 209 revolves is disposed.

  Such a pinion 209 transmits a driving force to the pair of side gears 211 and 213, and is rotatably supported by the pinion shaft 207 so as to be driven to rotate when a differential rotation occurs between the pair of side gears 211 and 213 engaged with each other. Has been.

  The pair of side gears 211 and 213 are supported by the outer case 203 so as to be relatively rotatable by boss portions formed respectively, and mesh with the pinion 209.

  Between the pair of side gears 211 and 213 and the outer case 203 in the axial direction, thrust washers 225 and 227 that receive the movement of the side gears 211 and 213 in the axial direction by the meshing reaction force with the pinion 209 are arranged, respectively. .

  The pair of side gears 211 and 213 has spline-shaped connecting portions 229 and 231 provided on the inner peripheral side, and a drive shaft (not shown) connected to an output side mechanism such as a left and right wheel is a side gear. The driving force input to the inner case 205 is output to the output side mechanism via the driving shaft.

  The driving force transmitted to the inner case 205 side is interrupted by an interrupting mechanism 215 provided between the outer case 203 and the inner case 205. When the interrupting mechanism 215 is in a connected state, the outer case 203 A driving force is transmitted to the inner case 205.

  Thus, the power transmission device 201 having the intermittent mechanism 215 for intermittently transmitting power between the outer case 203 and the inner case 205 is a so-called free running differential. The intermittent mechanism 215 includes an intermittent member 233, an intermittent portion 235, a movable member 237, and an electromagnet 239.

  The intermittent member 233 is formed in an annular shape, and a base portion 241 formed of a single member that is continuous in the circumferential direction is disposed so as to be movable in the axial direction between the wall portion of the outer case 203 and the inner case 205.

  An engaging portion 243 that engages with the outer case 203 so as to rotate together with the outer case 203 is provided on the wall portion side of the outer case 203 of the intermittent member 233, and an intermittent portion 235 is provided on the inner case 205 side of the intermittent member 233. It has been.

  The engaging portion 243 includes a plurality of convex portions 245 provided at equal intervals in the circumferential direction on the base portion 241 of the intermittent member 233, and a hole portion 247 provided through the wall portion of the outer case 203 at equal intervals in the circumferential direction. Consists of.

  When the convex portion 245 and the hole portion 247 are engaged in the rotation direction, the intermittent member 233 is prevented from rotating around the outer case 203, and the intermittent member 233 and the outer case 203 can be integrally rotated.

  The engaging portion 243 is provided with a cam that moves the intermittent member 233 in the connecting direction of the intermittent portion 235. Specifically, cam surfaces having the same inclination are formed on the opposing surfaces of the convex portion 245 and the hole portion 247 on both sides in the circumferential direction.

  For this reason, when the intermittent member 233 is moved in the connecting direction of the intermittent portion 235 and a meshing action in the rotational direction is generated in the intermittent portion 235 between the outer case 203 and the inner case 205, the outer case 203 rotates, respectively. By engaging the cam surface, the intermittent member 233 is further moved in the meshing direction of the intermittent portion 235, and the connection of the intermittent portion 235 is strengthened.

  The intermittent portion 235 is provided between the engaging portion 243 of the base portion 241 of the intermittent member 233 and the axial direction between the intermittent case 233 and the inner case 205 on the side opposite to the axial direction. A plurality of meshing teeth are formed in the circumferential direction and mesh with each other.

  The intermittent portion 235 is connected so that the intermittent members 233 and the inner case 205 can be integrated, that is, the outer case 203 and the inner case 205 are connected so as to be integrally rotatable. Power transmission with the inner case 205 is possible.

  The intermittent member 233 constituting the intermittent portion 235 for intermittently transmitting power between the outer case 203 and the inner case 205 is axially moved integrally with the intermittent member 233 on the axial end surface of the convex portion 245. The interlocking member 249 is fixed via a bolt.

  Between the axial direction of the interlocking member 249 and the wall portion of the outer case 203, the interlocking member 249 is urged in the disconnecting direction of the intermittent portion 235, and the intermittent member 233 is always attached in the disconnecting direction of the intermittent portion 235. An energizing return spring 251 is arranged.

  The return spring 251 urges the intermittent member 233 in the direction of disconnection of the intermittent portion 235 so that when the movable member 237 is moved by the excitation of the electromagnet 239, the intermittent member 233 is disconnected via the interlocking member 249. The connection part 235 is moved in the connection release direction of 235, and the intermittent part 235 is brought into a connection release state.

  The movable member 237 is disposed on the outer periphery of an annular support portion 253 made of a nonmagnetic material provided integrally with the electromagnet 239 on the inner diameter side of the electromagnet 239, and the movement in the radial direction is restricted. In this manner, it is supported by the support portion 253 and includes an annular magnetic flux transmission portion 255 and an annular movement operation portion 257.

  The magnetic flux transmission part 255 is formed in an annular shape from a magnetic material, and is disposed on the inner diameter side of the electromagnet 239 with an air gap that is a minute gap set so that magnetic flux can be transmitted. A movement operation unit 257 is integrally fixed to the inner periphery of the magnetic flux transmission unit 255.

  The movement operation unit 257 is formed in a ring shape from a nonmagnetic material, and prevents the magnetic flux from leaking from the inner peripheral side of the magnetic flux transmission unit 255 to the outer case 203 side. The movement operation unit 257 is disposed on the outer periphery of the support unit 253 made of a nonmagnetic material so as to be movable in the axial direction, and further prevents magnetic flux from leaking to the outer case 203 side.

  The end surface of the moving operation unit 257 on the side of the intermittent member 233 is disposed so as to be able to come into contact with the interlocking member 249, and the movable member 237 is disposed between the movement operation unit 257 and the support unit 253 in the axial direction. A biasing member 259 that constantly biases in the connecting direction of the intermittent portion 235 is disposed.

  The biasing member 259 is set to have a biasing force larger than that of the return spring 251, and the movable member 237 is intermittently connected to the intermittent portion 235 against the biasing force of the return spring 251 in a state where the electromagnet 239 is not excited. The intermittent member 233 is moved in the connecting direction of the intermittent portion 235 via the interlocking member 249, so that the intermittent portion 235 is connected.

  The connection state of the intermittent portion 235 by the biasing member 259 is released by the movement of the movable member 237 in the disconnection direction of the movable member 237 against the biasing force of the biasing member 259 due to the excitation of the electromagnet 239.

  The electromagnet 239 has a diameter relative to the outer case 203 by sliding the inner peripheral surface of the annular support portion 253 made of a nonmagnetic material integrally provided on the inner diameter side with the outer peripheral surface of the boss portion 219 of the outer case 203. The electromagnetic coil 261 and the core 263 are supported in the direction.

  Here, the electromagnet 239 includes not only the electromagnetic coil 261 and the core 263 but also a support portion 253 provided integrally on the inner diameter side of the core 263. In the following description, the electromagnetic coil 261, the core 263, and the support portion 253 are combined. This is referred to as an electromagnet 239.

  The electromagnetic coil 261 is annularly wound with a predetermined number of turns and molded with resin. The electromagnetic coil 261 is connected to a lead wire (not shown), and is connected to a controller (not shown) that controls energization via the lead wire.

  The core 263 is made of a magnetic material so that a magnetic field is formed by energization of the electromagnetic coil 261, and has a predetermined magnetic path cross-sectional area. The core 263 covers the periphery of the electromagnetic coil 261 so that magnetic flux can be transferred to and from the magnetic flux transmitting portion 255 of the movable member 237 on the inner diameter side.

  The electromagnet 239 forms a self-contained magnetic flux loop by passing a magnetic flux through the core 263 and the magnetic flux transmitting portion 255 of the movable member 237 by energizing the electromagnetic coil 261, and connects the movable member 237 to the intermittent portion 235. Move in the direction.

  Such an electromagnet 239 is prevented from rotating with respect to the stationary member by engaging a stationary member (not shown) integrally provided on the axial end surface of the core 263 with a stationary member such as a carrier. ing.

  Note that a retaining portion 265 made of a non-magnetic material is provided integrally with the electromagnet 239 on the axial end surface of the core 263 of the electromagnet 239 on the intermittent member 233 side by welding or bonding.

  The retaining portion 265 is disposed opposite to the magnetic flux transmitting portion 255 of the movable member 237 in the axial direction, and moves with the urging force of the urging member 259 in a state where the electromagnet 239 is removed from the outer case 203. The movable member 237 is prevented from falling off from the electromagnet 239 by coming into contact with the magnetic flux transmitting portion 255 of the 237.

  Here, the electromagnet 239 is disposed so that the axial end surface of the support portion 253 on the outer case 203 side can come into contact with a stepped portion formed on the boss portion 219 of the outer case 203, and one side in the axial direction (here, It is positioned so that movement in the direction toward the outer case 203 side) is restricted.

  On the other hand, the electromagnet 239 is disposed so that the axial end surface of the support portion 253 on the bearing 19 (see FIG. 1) side can abut on the inner race of the bearing 19, and is directed to the other axial side (here, toward the bearing 19 side). Is positioned so that movement in the direction is restricted.

  In the power transmission device 201 configured as described above, the movable member 237 is moved in the connecting direction of the intermittent portion 235 by the biasing member 259 while the electromagnetic coil 261 of the electromagnet 239 is not energized, and is connected via the interlocking member 249. Thus, the intermittent member 233 is moved in the connecting direction of the intermittent portion 235 against the urging force of the return spring 251.

  By the movement of the intermittent member 233 in the connecting direction of the intermittent portion 235, the intermittent portion 235 is connected, and power transmission between the outer case 203 and the inner case 205 becomes possible.

  On the other hand, in the power transmission device 201, the energization of the electromagnet 239 to the electromagnetic coil 261 moves the movable member 237 against the urging force of the urging member 259 in the disconnecting direction of the intermittent portion 235 and interlocks with the return spring 251. The intermittent member 233 is moved in the direction of disconnection of the intermittent portion 235 via the member 249.

  By the movement of the intermittent member 233 in the disconnecting direction of the intermittent portion 235, the connection of the intermittent portion 235 is released, and the power transmission between the outer case 203 and the inner case 205 is interrupted.

  An operation unit (not shown) for turning on / off a position switch (not shown) for detecting the intermittent state of the intermittent part 235 is arranged on the outer diameter side of the interlocking member 249. The outer diameter side of the member 249 is engaged, and the intermittent state of the intermittent part 235, that is, the state of power transmission between the outer case 203 and the inner case 205 in the power transmission device 201 can be detected.

  In such a power transmission device 201, when the outer case 203 is supported by the bearing 19 (see FIG. 1), the electromagnet 239 moves to the other side in the axial direction (the direction in which the outer case 203 falls off from the outer case 203). Movement is regulated.

  However, for example, when the outer case 203 is not supported by the bearing 19 such as when the electromagnet 239 is assembled and transported to the outer case 203, the electromagnet 239 can move to the other side in the axial direction. The electromagnet 239 may fall off the outer case 203 during transportation.

  Therefore, a regulating member 267 that regulates the axial movement of the electromagnet 239 is disposed between the outer case 203 and the electromagnet 239. Hereinafter, the power transmission device including the regulating member 267 will be described in detail with reference to FIG.

(Third embodiment)
A third embodiment will be described with reference to FIG.

  As described above, the power transmission device 201 according to the present embodiment has a shaft mounted on the outer case 203 and the inner case 205 as a pair of rotating members arranged so as to be relatively rotatable, and the outer case 203 as one rotating member. An intermittent member 233 that is movable in the direction and connected to be integrally rotatable, and the intermittent member 233 is provided between the inner case 205 as the other rotating member and interrupts power transmission between the outer case 203 and the inner case 205. The intermittent part 235 and the electromagnet 239 which is arrange | positioned on the outer periphery of the outer case 203 and operates the axial direction movement of the intermittent member 233 are provided.

  And between the radial direction of the outer case 203 and the electromagnet 239, a regulating member 267 that regulates the axial movement of the electromagnet 239 within the axial range of the electromagnet 239 is disposed.

  The restricting member 267 is disposed with a gap between the electromagnet 239 and the axial direction.

  Furthermore, the regulating member 267 supports the electromagnet 239 in the radial direction.

  The outer case 203 is supported in the radial direction by a bearing 19 as a first bearing, and the electromagnet 239 is restricted from moving in both axial directions by the outer case 203 and the bearing 19.

  As shown in FIG. 11, as described above, the electromagnet 239 includes a step portion in which both axial end surfaces of the support portion 253 are formed on the boss portion 219 of the outer case 203 and an inner portion of the bearing 19 (see FIG. 1). It arrange | positions so that contact | abutting with a race is possible, and it is positioned so that the movement to both axial directions may be controlled.

  In this way, by restricting the movement of the electromagnet 239 in both axial directions by the outer case 203 and the bearing 19, the electromagnet 239 can be stably disposed with respect to the outer case 203, and the intermittent characteristics of the intermittent portion 235. Can be stabilized.

  Such an electromagnet 239 is prevented from dropping from the outer case 203 by the regulating member 267 in a state where the outer case 203 is not supported by the bearing 19 at the time of conveyance or the like.

  The regulating member 267 is made of a sliding member such as a bush, is formed in an annular shape, and is fixed to the outer periphery of the boss portion 219 of the outer case 203 by press fitting or the like. The restricting member 267 is located within the range of the electromagnet 239 in the axial direction.

  Here, the range in the axial direction of the electromagnet 239 means the range in the axial direction including the support portion 253 formed integrally with the core 263, and here, the regulating member 267 is the support portion 253. It is located within the axial range.

  By thus arranging the regulating member 267 within the range of the electromagnet 239 in the axial direction, the regulating member 267 does not protrude from the electromagnet 239 in the axial direction, and the outer case 203 in which the regulating member 267 is arranged is enlarged. There is nothing to do.

  The restriction member 267 slides with the inner periphery of the support portion 253 of the electromagnet 239 and serves as a support member that supports the electromagnet 239 in the radial direction with respect to the boss portion 219 of the outer case 203. Has been improved.

  A protrusion provided on the support portion 253 of the electromagnet 239 is disposed on the axial end surface on the intermittent member 233 side of the regulating member 267 that is disposed within the axial range of the electromagnet 239 and supports the electromagnet 239 in the radial direction. 269 are arranged to face each other.

  The protrusion 269 protrudes from the inner periphery of the support portion 253 of the electromagnet 239 toward the boss 219 of the outer case 203, the electromagnet 239 is disposed on the boss 219 of the outer case 203, and the bearing 19 is attached to the electromagnet 239. In a contact state, a clearance is provided between the regulating member 267 and the axial direction.

  Therefore, in a state where the power transmission device 201 is mounted on the vehicle and the outer case 203 is rotating, the regulating member 267 does not regulate the axial movement of the electromagnet 239, and the load due to the axial movement of the electromagnet 239 is not. There is no input to the regulating member 267.

  Therefore, when the position of the electromagnet 239 in the axial direction is positioned by the outer case 203 and the bearing 19, the load due to the axial movement of the electromagnet 239 is not input to the regulating member 267. A moving member can be used as the restricting member 267, and the restricting member 267 does not increase in cost.

  On the other hand, when the bearing 19 is not in contact with the electromagnet 239 at the time of conveyance or the like, the protrusion 269 and the axial end surface of the restricting member 267 when the electromagnet 239 tries to move in the direction of dropping from the outer case 203. It abuts and restricts the movement of the electromagnet 239 in the axial direction to prevent the electromagnet 239 from falling off the outer case 203.

  In such a power transmission device 201, the regulating member 267 that regulates the axial movement of the electromagnet 239 within the axial range of the electromagnet 239 is disposed between the outer case 203 and the electromagnet 239 in the radial direction. The restricting member 267 does not protrude outward in the axial direction from the end surface of the electromagnet 239 in the axial direction, and a portion for disposing the restricting member 267 in the axial direction outward of the electromagnet 239 of the outer case 203 needs to be provided. Absent.

  Therefore, in such a power transmission device 201, the restriction member 267 that restricts the movement of the electromagnet 239 in the axial direction is disposed within the range of the electromagnet 239 in the axial direction. Therefore, the electromagnet 239 can be removed without increasing its size. Can be prevented.

  Further, since the regulating member 267 is disposed with a gap between the electromagnet 239 and the axial direction, the load due to the axial movement of the electromagnet 239 is input to the regulating member 267 when the outer case 203 is rotating. In addition, the movement of the electromagnet 239 in the axial direction during conveyance can be stably regulated by the regulating member 267.

  Furthermore, since the regulating member 267 supports the electromagnet 239 in the radial direction, the support stability of the electromagnet 239 can be improved, and the intermittent characteristics of the intermittent portion 235 can be stabilized.

  Further, since the electromagnet 239 is restricted from moving in both axial directions by the outer case 203 and the bearing 19, when the outer case 203 is supported by the bearing 19, the regulating member 267 moves in the axial direction of the electromagnet 239. It is possible to reduce the cost of the regulating member 267 by, for example, reducing the rigidity of the regulating member 267.

  In addition, in the power transmission device according to the embodiment of the present invention, the support portion provided integrally with the core of the electromagnet is provided with the groove portion or the protrusion portion that engages with the restriction member. You may provide the groove part, protrusion, etc. which engage with a control member in a core.

  In addition, the power transmission device is a differential device having a differential lock function or a free running differential, but is not limited thereto, and any power transmission device having an intermittent portion that interrupts power transmission of a pair of rotating members may be used. Such a structure may be used, and the input / output relationship of the pair of rotating members may be any as long as the driving force can be input / output.

  Further, the intermittent portion is a meshing clutch of opposing teeth facing in the axial direction, but is not limited to this, and has a sleeve that can move in the axial direction, and the opposing teeth facing between the sleeves in the radial direction. As long as the power transmission between the pair of rotating members can be interrupted, such as a meshing clutch or a friction clutch composed of a multi-plate clutch, a single-plate clutch, etc., the form of the intermittent portion may be any.

1, 101, 201 ... Power transmission device 3 ... Differential case (one rotating member)
9: Side gear (the other rotating member)
19 ... Bearing (first bearing)
31, 233... Intermittent member 53, 235 .. intermittent portion 57, 239 .. electromagnet 85, 267 .. restriction member 203 .. outer case (one rotating member)
205 ... Inner case (the other rotating member)

Claims (4)

A differential case that rotates upon input of a driving force, a pinion that is accommodated in the differential case, a pair of side gears that engage with the pinion and that are differentially rotatable and are accommodated in the differential case and output the driving force, and an axial direction to the differential case An intermittent member connected to be movable and integrally rotatable, an intermittent portion provided between the intermittent member and one of the pair of side gears, and an outer periphery of the differential case. A differential device including an anti-magnet having an anti-rotation member and an electromagnet that moves the movable member by excitation to operate the axial movement of the intermittent member;
A regulating member that regulates the axial movement of the electromagnet with respect to the differential case is disposed within the axial range of the electromagnet and on the inner diameter side of the electromagnetic coil,
The differential device according to claim 1, wherein the electromagnet is supported in a radial direction by sliding with an outer peripheral surface of the differential case on one axial side of the regulating member. The differential device according to claim 1,
The differential device according to claim 1, wherein the electromagnet is disposed so as to be in contact with a stepped portion formed in the differential case on one side in the axial direction. An outer case that rotates upon input of a driving force, an inner case that is accommodated in the outer case so as to be relatively rotatable, a pinion that is accommodated in the inner case, and is engaged with the pinion so as to be differentially rotatable. A pair of side gears arranged in the case for outputting driving force, an intermittent part for interrupting power transmission between the outer case and the inner case, and a detent arranged on the outer periphery of the outer case and engaged with a stationary system member A differential apparatus comprising an electromagnet that moves the movable member by excitation with excitation and operates the intermittent portion of the intermittent portion,
A regulating member that regulates the axial movement of the electromagnet with respect to the outer case is disposed within the axial range of the electromagnet and on the inner diameter side of the electromagnetic coil,
The differential device according to claim 1, wherein the electromagnet is supported in a radial direction by sliding with an outer peripheral surface of the outer case on one axial side of the regulating member. A differential device according to claim 3, wherein
The differential device according to claim 1, wherein the electromagnet is disposed so as to be able to contact the outer case on one axial side.